My otherwise perfectly healthy, 5 yo, male, black lab (with the exception of an occasional ear infection) has recently aquired flakey skin on the outside of his ear. WHAT IS THAT?[&:] We have givien him dermcap all his life, he gets no people food, has been eating same Eagle brand dog food, gets regular grooming etc etc...is it mange mites? I may freak[:-] a little at that...